Re: Use faceted search to drill down in hierarchical structure and omit node data outside current selection

[PeterKerk]

Hi Alessandro!

I'm having a hard time on how to use the PathHierarchyTokenizerFactory. I
was reading here:
https://lucene.apache.org/core/4_4_0/analyzers-common/org/apache/lucene/analysis/path/PathHierarchyTokenizerFactory.html

And ended up with this:

        
        <fieldType name="descendent_path" class="solr.TextField">
           <analyzer type="index">
                 <tokenizer class="solr.PathHierarchyTokenizerFactory" 
delimiter=">" />
           </analyzer>
           <analyzer type="query">
                 <tokenizer class="solr.KeywordTokenizerFactory" />
           </analyzer>
         </fieldType>

I tried with these field definitions:
         
        <field name="categorystring_nl" type="string" indexed="true" 
stored="true"
multiValued="true"/>
        <field name="categorystring_tokenized" type="descendent_path"
indexed="true" stored="true" multiValued="true"/>
        
And these querystring parameters in the request:
        
1.      
&facet.field=categorystring_nl --> this returns a facet with count based on
full categorystring, e.g. "bruidstaart>taarttoppers>grappig", so I can't use
that for the count on the highest category level (in this case
"bruidstaart"):

<lst name="categorystring_nl">
        <int name="feestartikelen>ballonnen">15</int>
        <int name="bruidstaart>taarttoppers>grappig">6</int>
        <int name="taarttoppers>grappig">6</int>
        <int name="accessoires>tiaras">3</int>
</lst>



2. 
&facet.field=categorystring_tokenized, this now returns:

<lst name="categorystring_tokenized">
        <int name="feestartikelen">15</int>
        <int name="feestartikelen>ballonnen">15</int>
        <int name="bruidstaart">6</int>
        <int name="bruidstaart>taarttoppers">6</int>
        <int name="bruidstaart>taarttoppers>grappig">6</int>
        <int name="taarttoppers">6</int>
        <int name="taarttoppers>grappig">6</int>
        <int name="accessoires">3</int>
        <int name="accessoires>tiaras">3</int>
</lst>


I'm now wondering, is this the data you expected me to end up with? Right
now I still don't see how I can easily extract the hierarchy from this data,
except by looping through the facets and count the number of ">" occurrences
in the "name" attribute to determine the actual level in the hierarchy.

Can you advice? 

Thanks again!








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